Conditional probability
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6 Terms
1
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What does P(A|B) mean?
The probability that A occurs given that B has already happened
2
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What is the conditional probability formula (multiplication law for **dependent** events)
P(AnB)= P(A) x P(B|A)
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P(AnB) = P(B) x P(A|B)
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P(AnB) = P(B) x P(A|B)
3
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P(AnB’) for conditional probability
P(AnB’)= P(A) x P(B’|A)
4
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P(A’nB) for conditional probability
P(A’nB) = P(A’) x P(B|A’)
5
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P(A’nB’) for conditional probability
P(A’nB’)= P(A’) x P(B’|A’)
6
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Laws for independent events
* P(AnB)= P(A) x P(B)
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* P(A) + P(B) - P(AuB)
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* P(A) + P(B) - P(AuB)
Note 
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